Distribution of time2averaged dynamic water pressure and abrasion resistance in the impact zone of bottom 2flow dissipation with step2down floor
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Abstract:
On the basis of creating water flow regime partitions in the impact zone of bottom2flow dissipation with step 2down floor and the theory of free turbulent jet flow, an empirical formula of time 2averaged dynamic water pressure in the impact zone was obtained under different incident angles. The distribution diagram of dynamic water pressure in the impact zone was ana 2 lyzed using matlab. The effects of step 2down floor on the dynamic water pressure under the same incident angle and flow rate, and the effects of incident flow rate on the dynamic water pressure under the same incident angle and step 2down floor were in2 vestigated, and the most vulnerable area to damage and abrasion in the impact zone was determined. A reservoir project was se 2 lected as the case study. The relevant parameters of the empirical formula were deduced based on the measured data to verify the feasibility of the empirical formula. With the knowledge of the bottom velocity, the abrasion resistance strength of concrete floor in the impact zone of bottom2flow dissipation was obtained. The research can provide reference for the strength classification of concrete floor of bottom2flow dissipation.
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